/*
 * Copyright (C) 2012 DataSymphony (http://datasymphony.com.au)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package au.com.ds.restty.ssl;


import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;
import javax.net.ssl.X509TrustManager;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class EasySSLX509TrustManager implements X509TrustManager
{
	private X509TrustManager standardTrustManager = null;
	private static final Log LOG = LogFactory.getLog(EasySSLX509TrustManager.class);

	public EasySSLX509TrustManager(KeyStore keystore) throws NoSuchAlgorithmException, KeyStoreException {
		super();
		TrustManagerFactory factory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
		factory.init(keystore);
		TrustManager[] trustmanagers = factory.getTrustManagers();
		if (trustmanagers.length == 0) {
			throw new NoSuchAlgorithmException("no trust manager found");
		}
		this.standardTrustManager = (X509TrustManager)trustmanagers[0];
	}

	public void checkClientTrusted(X509Certificate[] certificates,String authType) throws CertificateException {
		standardTrustManager.checkClientTrusted(certificates,authType);
	}

	public void checkServerTrusted(X509Certificate[] certificates,String authType) throws CertificateException {
		if ((certificates != null) && LOG.isDebugEnabled()) {
			LOG.debug("Server certificate chain:");
			for (int i = 0; i < certificates.length; i++) {
				LOG.debug("X509Certificate[" + i + "]=" + certificates[i]);
			}
		}
		if ((certificates != null) && (certificates.length == 1)) {
			certificates[0].checkValidity();
		} else {
			standardTrustManager.checkServerTrusted(certificates,authType);
		}
	}

	public X509Certificate[] getAcceptedIssuers() {
		return this.standardTrustManager.getAcceptedIssuers();
	}
}